Xt test fixes
v0.004

 - Xt test fixes [Shantanu]
 - Fixed error in L3GD20.pm [Shantanu]
 - Refactored Libraries to give all similar devices a common prefix for
   easy identification as plugins [Shantanu]
 - Merge branch 'master' of github.com:shantanubhadoria/Device-L3GD20
   [Shantanu Bhadoria]
 - minor Changes [Shantanu Bhadoria]